Abstract
Standard SQL is insufficiently expressive for representing many access control policies that are needed in practice. Nevertheless, we show how rich forms of access control policies can be defined within SQL when small amounts of contextual information are available to query evaluators. Rather than the standard, relational structure perspective that has been adopted for fine-grained access control, we consider instead the representation of dynamic fine-grained access control (DFMAC) policy requirements at the access policy level. We also show how DFMAC policies may be represented in SQL and we give some performance results for an implementation of our approach.KeywordsAccess ControlOpen PolicyQuery EvaluationAccess Control PolicyAccess Control ModelThese keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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